BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Convertible preferred stock, shares authorized		52,953,684
Preferred stock, par value (in dollars per share)	$ 0.001
Preferred stock, shares authorized	25,000,000
Preferred stock, shares issued	0
Preferred stock, shares outstanding	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	13,941,386	494,260
Common stock, shares outstanding	13,912,155	465,029
Treasury stock, shares	29,231	29,231
Series A Preferred Stock
Convertible preferred stock, par value (in dollars per share)		$ 0.001
Convertible preferred stock, shares authorized		18,777,860
Convertible preferred stock, shares issued		18,777,860
Convertible preferred stock, shares outstanding		18,777,860
Series B Preferred Stock
Convertible preferred stock, par value (in dollars per share)		$ 0.001
Convertible preferred stock, shares authorized		15,275,824
Convertible preferred stock, shares issued		12,220,661
Convertible preferred stock, shares outstanding		12,220,661
Series C Preferred Stock
Convertible preferred stock, par value (in dollars per share)		$ 0.001
Convertible preferred stock, shares authorized		18,900,000
Convertible preferred stock, shares issued		18,381,463
Convertible preferred stock, shares outstanding		18,381,463